It is an MIT-licensed open source app that…

People never learn. If this gets popular, some proprietary fork (probably owned by a US company) will win, become incompatible with the open source version, and maybe even hire the original devs and kill off the original project.

He might be wrong about many things (like a child’s ability to consent), but Stallman was certainly right about software licensing.

Can’t be worse than Teams in terms of bugs at least

No, they rebranded LiveKit, which is open source but afaik developed by a silicon valley startup.